HAZARDOUS WEATHER OUTLOOK
Issue Date: 358 AM PST THU DEC 24 2009
Expiration: 500 AM PST FRI DEC 25 2009

Expires:200912251300;;
FLUS45 KBOI 241156
HWOBOI
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BOISE ID
456 AM MST THU DEC 24 2009
ORZ061-062-251300-
HARNEY COUNTY-BAKER COUNTY-
356 AM PST THU DEC 24 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
OREGON AND SOUTHEAST OREGON.
.DAY ONE...TODAY AND TONIGHT
AIR STAGNATION ADVISORY IN EFFECT UNTIL 4 PM PST SATURDAY.
AIR QUALITY DETERIORATING IN THE VALLEYS AND BASINS DUE TO
ACCUMULATION OF PARTICULATE MATTER IN THE COLD VALLEYS AND BASINS
WHERE THERE WILL BE LITTLE OR NO AIR MOVEMENT.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
AIR STAGNATION ADVISORY IN EFFECT UNTIL 4 PM PST SATURDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED.
$$

AIR STAGNATION ADVISORY
Issue Date: 1218 AM PST THU DEC 24 2009
Expiration: 400 PM PST SAT DEC 26 2009

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
SATURDAY...
AN AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
SATURDAY FOR PARTS OF HARNEY AND BAKER COUNTY.
* AIR QUALITY...WILL BE DETERIORATING IN THE COLDER VALLEYS AND
  BASINS DUE TO ACCUMULATION OF PARTICULATE MATTER WHERE THERE
  WILL BE LITTLE OR NO AIR MOVEMENT.
* IMPACTS...AFFECTING PERSONS WITH RESPIRATORY PROBLEMS AND
  PERSONS ENGAGED IN STRENUOUS OUTDOOR ACTIVITIES. SMALL SIZE
  PARTICULATES ARE OF GREAT CONCERN BECAUSE THEY CAN BE INHALED
  DEEPLY INTO THE LUNGS WHERE THEY CAN REMAIN FOR YEARS. THE
  HEALTH EFFECTS OF PARTICULATE MATTER VARY WITH THE SIZE...
  CONCENTRATION... AND CHEMICAL COMPOSITION OF THE PARTICLES.
* OBSERVATIONS...MAXIMUM VALUES WEDNESDAY OF SMALL
  PARTICULATES...PM2.5...WERE 40.4 AT 5 AM IN BAKER CITY AND 54.6
  AT 9 PM IN BURNS OREGON. VALUES ARE IN MICROGRAMS PER CUBIC
  METER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT
OF AN AIR MASS ACROSS THE ADVISORY AREA...POLLUTION WILL INCREASE
TO DANGEROUS LEVELS. PERSONS WITH RESPIRATORY ILLNESS SHOULD
FOLLOW THEIR PHYSICIANS ADVICE FOR DEALING WITH HIGH LEVELS OF
AIR POLLUTION.
&&
$$